參數(shù)資料
型號(hào)： BQ3285S
廠商： TEXAS INSTRUMENTS INC
元件分類： XO, clock
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO24
封裝： 0.300 INCH, PLASTIC, SOIC-24
文件頁(yè)數(shù)： 21/26頁(yè)
文件大?。?/td> 676K
代理商： BQ3285S
Functional Description
Address Map
The bq3285 provides 14 bytes of clock and control/status
registers and 114 bytes of general nonvolatile storage.
Figure 1 illustrates the address map for the bq3285.
Update Period
The update period for the bq3285 is one second. The
bq3285 updates the contents of the clock and calendar
locations during the update cycle at the end of each up-
date period (see Figure 2). The alarm flag bit may also
be set during the update cycle.
The bq3285 copies the local register updates into the
user buffer accessed by the host processor. Whena1is
written to the update transfer inhibit bit (UTI) in regis-
ter B, the user copy of the clock and calendar bytes re-
mains unchanged, while the local copy of the same bytes
continues to be updated every second.
The update-in-progress bit (UIP) in register A is set
tBUC time before the beginning of an update cycle (see
Figure 2). This bit is cleared and the update-complete
flag (UF) is set at the end of the update cycle.
4
Clock and
Control Status
Registers
Storage
Registers
14
Bytes
114
Bytes
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
00
1
2
3
4
5
6
7
8
9
10
11
12
13
14
127
7F
0E
0D
BCD or
Binary
Format
Seconds
Seconds Alarm
Minutes
Minutes Alarm
Hours
Month
Year
Register A
Register B
Register C
Register D
Hours Alarm
Day of Week
Day of Month
Figure 1. Address Map
Update Period
(1s)
tBUC
tUC (Update Cycle)
UIP
Figure 2. Update Period Timing and UIP
bq3285
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
BQ3285S- 制造商:TI 制造商全稱:Texas Instruments 功能描述:Real-Time Clock RTC
BQ3285S-SB2 功能描述:實(shí)時(shí)時(shí)鐘 RTC IC with 114x8 NVSRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ3285S-SB2G4 功能描述:實(shí)時(shí)時(shí)鐘 RTC IC with 114x8 NVSRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ3285S-SB2TR 功能描述:實(shí)時(shí)時(shí)鐘 RTC IC with 114x8 NVSRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
BQ3285S-SB2TRG4 功能描述:實(shí)時(shí)時(shí)鐘 RTC IC with 114x8 NVSRAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
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